68860640 has 48 divisors (see below), whose sum is σ = 166162752. Its totient is φ = 26955264.

The previous prime is 68860639. The next prime is 68860651. The reversal of 68860640 is 4606886.

It is a junction number, because it is equal to n+sod(n) for n = 68860594 and 68860603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2942 + ... + 12098.

It is an arithmetic number, because the mean of its divisors is an integer number (3461724).

Almost surely, 2^68860640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68860640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83081376).

68860640 is an abundant number, since it is smaller than the sum of its proper divisors (97302112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68860640 is a wasteful number, since it uses less digits than its factorization.

68860640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9219 (or 9211 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 68860640 is about 8298.2311368146. The cubic root of 68860640 is about 409.8802743816.

The spelling of 68860640 in words is "sixty-eight million, eight hundred sixty thousand, six hundred forty".